Fixed - Wrong value for MaterialCheckBoxCell isChecked #430

Author: kevzlou7979

gwt-material/src/main/java/gwt/material/design/client/base/MaterialCheckBoxCell.java

@@ -76,7 +76,7 @@ public void onBrowserEvent(Context context, Element parent, Boolean value, Nativ
             || event.getType().equals(BrowserEvents.CLICK);
 
         if (BrowserEvents.CHANGE.equals(type) || enterPressed) {
-            InputElement input = parent.getFirstChild().cast();
+            InputElement input = parent.getFirstChild().getFirstChild().cast();
             Boolean isChecked = input.isChecked();
 
             /*